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Garmin GPS 24XD NMEA 2000 Installation Instructions Manual

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GPS 24XD NMEA 2000
®
INSTALLATION INSTRUCTIONS
Important Safety Information
CAUTION
To avoid possible personal injury, always wear safety goggles, ear protection, and a dust mask when drilling,
cutting, or sanding.
NOTICE
When drilling or cutting, always check what is on the opposite side of the surface to avoid damaging the vessel.
For the best performance and to avoid damage to your boat, read all installation instructions before
proceeding. Install the device per these instructions. Use the appropriate fasteners, tools, and mounts listed,
which are available at most marine dealers.
The Garmin
GPS 24xd NMEA 2000 high-sensitivity GPS antenna provides position information to your existing
®
NMEA 2000 network. If your boat does not have a NMEA 2000 network, you will need to install one.
For more information, go to garmin.com.
Tools Needed
• Drill
• 3.2 mm (1/8 in.) drill bit
• 19 mm (3/4 in.) drill bit for a pole-mount cable-hole
• 25 mm (1 in.) hole saw for a surface-mount cable-hole
• Countersink bit for mounting on fiberglass
• Screws for under-deck mounting
• Screwdriver, appropriate for the screw type
• Marine sealant (optional)
• Additional NMEA 2000 network components as needed
TA-2020/6796
June 2021
GUID-28CE8C25-CFD8-4C12-B6D0-AD9CDF4D5084 v3

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Summary of Contents for Garmin GPS 24XD NMEA 2000

  • Page 1 The Garmin GPS 24xd NMEA 2000 high-sensitivity GPS antenna provides position information to your existing ® NMEA 2000 network. If your boat does not have a NMEA 2000 network, you will need to install one.

  • Page 2: Mounting The Antenna

    Mounting the Antenna Antenna Mounting Considerations CAUTION Do not install or store the antenna near strong magnets, including speakers. A strong magnetic field can damage the antenna. You can mount the antenna on a flat surface or attach it to a standard 1 in. OD, 14 threads per inch, pipe- threaded pole (not included).
  • Page 3 Testing the Mounting Location 1 Temporarily secure the antenna in the preferred mounting location and test it for correct operation. 2 If you experience interference with other electronics, move the antenna to a different location, and test it again. 3 Repeat steps 1–2 until you observe full or acceptable signal strength. 4 Permanently mount the antenna.
  • Page 4 Surface Mounting the Antenna NOTICE If you are mounting the bracket on fiberglass with screws, it is recommended to use a countersink bit to drill a clearance counterbore through only the top gel-coat layer. This will help to avoid cracking in the gel-coat layer when the screws are tightened.
  • Page 5 Mounting the Antenna on a Pole Mounting the Antenna with the Cable Routed Outside the Pole Before you permanently mount the antenna, you must test the mounting location for correct operation (Testing the Mounting Location, page 1 Route the cable through the pole-mount adapter , and place the cable in the vertical slot along the base of the pole-mount adapter.
  • Page 6 Mounting the Antenna with the Cable Routed Through the Pole Before you permanently mount the antenna, you must test the mounting location for correct operation (Testing the Mounting Location, page 1 Position a standard 1 in. OD, 14 threads per inch, pipe-threaded pole (not included) in the selected location, and mark the approximate center of the pole.
  • Page 7 Mounting the Antenna Under a Surface NOTICE Verify that the supplied screws will not penetrate the surface before you install the under-deck mounting bracket. If the supplied screws are too long, use surface-appropriate screws instead. Because the antenna cannot acquire signals through metal, it must be mounted under a fiberglass surface only. 1 Determine and test the location under a fiberglass surface where you want to mount the antenna (Testing the Mounting Location, page...

  • Page 8: Connecting The Antenna

    (Performing Menu-Based Calibration, page If you connect the antenna to a NMEA 2000 network without a compatible Garmin chartplotter or with a third- party device, you must perform basic calibration instead of menu-based calibration.
  • Page 9 Garmin chartplotter. 1 Select Menu > Settings > Communications > NMEA 2000 Setup > Device List. 2 Select the GPS 24xd NMEA 2000 from the device list. 3 Select Review > Compass Cal. > Begin. 4 Follow the on-screen instructions until the compass calibration is complete, taking care to keep the boat as steady and level as possible.
  • Page 10 Performing Basic Calibration If you connect the antenna to a NMEA 2000 network without a compatible Garmin chartplotter or with a third- party device, you must perform basic calibration instead of menu-based calibration. Before you can perform basic calibration, you must be able to view heading data from the NMEA 2000 network on a connected device.

  • Page 11: Antenna Configuration

    When the heading data appears, the compass has been calibrated successfully, and you can align the heading (optional). 8 Select an option. • If you want to align the heading to match the front of the boat, proceed to the next step. •...

  • Page 12: Cleaning The Outer Casing

    1 Clean the outer casing of the device using a cloth dampened with a mild detergent solution. 2 Wipe the device dry. Appendix Software Update You must update the Garmin chartplotter software when you install this device. For instructions on updating the software, see your chartplotter owner's manual at support.garmin.com. Specifications Dimensions (diameter x height) ×...
  • Page 13 126996 Product information Declaration of Conformity Hereby, Garmin declares that this product is in compliance with the Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: garmin.com/compliance. UK Declaration of Conformity Hereby, Garmin declares that this product is in compliance with the relevant statutory requirements.

  • Page 14: Fcc Compliance

    This product does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modifications could result in permanent damage to the equipment, and void your warranty and your authority to operate this device under Part 15 regulations.
  • Page 15 © 2020 Garmin Ltd. or its subsidiaries Garmin ® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. These trademarks may not be used without the express permission of Garmin. NMEA 2000 ®...
  • Page 16 © 2020 Garmin Ltd. or its subsidiaries support.garmin.com...
  • Page 17 2), basic NMEA 2000 network-building instructions (NMEA 2000 Network Planning and Construction, page 4), and a list of NMEA 2000 data that may be used by some Garmin NMEA 2000 certified devices (General NMEA 2000 Data Types, page 12). What is NMEA 2000?

  • Page 18: Nmea 2000 Components

    NMEA 2000 Components Item Description Garmin Part Number Notes Connects devices to the backbone. You must use T-connectors properly when T-connector 010-11078-00 connecting devices to your NMEA 2000 network (Linear Backbone Construction, page You can use this instead of a T-connector and...

  • Page 19: Nmea 2000 Glossary

    Field-installable pictured connector 010-11095-00: female Can be used to shorten any Garmin NMEA 2000 backbone or drop cable NMEA 2000 Glossary Backbone: This is the main communication path of the NMEA 2000 network. The backbone can be as simple as three T-connectors connected side to side with terminators on both ends, or can expand to include many T-connectors separated by backbone cables.
  • Page 20 NMEA 2000 Network Planning and Construction The backbone is the main communication channel of an NMEA 2000 network to which your NMEA 2000 devices connect. You must connect each NMEA 2000 device to the backbone using a T-connector. You must connect the NMEA 2000 backbone to a power source, and you must install terminators at both ends of the network for proper functionality.
  • Page 21 Sample NMEA 2000 Network NOTE: This diagram illustrates only the NMEA 2000 data connections to each device or sensor on the network. Some devices or sensors can be powered by the NMEA 2000 network, and others may require a separate power connection.

  • Page 22: Linear Backbone Construction

    Linear Backbone Construction The backbone is the main communication path of the NMEA 2000 network, so it is extremely important to construct the backbone properly. An improperly constructed backbone may prevent the network from functioning, or you may experience unexpected performance. The backbone consists of a combination of T-connectors and cables, terminated on both ends.
  • Page 23 Power Connection Considerations NOTICE Connecting the NMEA 2000 network to a power source greater than 12 Vdc may damage devices connected to the network. You must connect the NMEA 2000 network to power through the ignition or other external switch, or it will drain the boat battery when not in use.
  • Page 24 Voltage drop = resistance × distance × load × 0.1 Resistance: Refers to cable resistance (ohms/m). The Garmin cable resistance value is 0.053. Distance: Refers to the distance from the power connection to the device located furthest away on the network (in meters).
  • Page 25 Backbone cable Length = 10 m Backbone cable Length = 6 m When the voltage-drop formula is applied to this example, the voltage drop is less than 1.67 Vdc. This NMEA 2000 network will function correctly when powered at the end: Resistance ×...

  • Page 26: Power Isolation

    Middle-Powered NMEA 2000 Network Designed Correctly Drop cable Length = 2 m Power cable Length = 2 m Drop cable Length = 4 m Drop cable Length = 6 m Backbone cable Length = 10 m Backbone cable Length = 6 m When the NMEA 2000 network is redesigned with the power source in the center, calculate the voltage drop in both directions.

  • Page 27: Network Termination

    Network Termination You must install terminators at the ends of an NMEA 2000 backbone for it to function correctly. You can install either two standard terminators or one female terminator and an in-line terminator on an NMEA 2000 network. NOTE: You must not install more than two terminators on an NMEA 2000 network. If the NMEA 2000 network is built using correct linear backbone construction, you should install one female terminator and one male terminator on the sides of the final T-connectors on opposite ends of the backbone.
  • Page 28 • No more than 50 NMEA 2000 devices can be connected to an NMEA 2000 network. Considerations for Existing NMEA 2000 Networks If a boat has an existing NMEA 2000 installation, and you would like to add Garmin NMEA 2000 equipment, you should observe these considerations.
  • Page 29 NMEA 2000 Engine Data Data Type PGN Data Required Typical Sender Battery voltage 127489: Dynamic engine parameters NMEA 2000 compatible engine Fuel flow rate 127489: Dynamic engine parameters Fuel flow sensor Hours 127489: Dynamic engine parameters NMEA 2000 compatible engine Oil pressure 127489: Dynamic engine parameters NMEA 2000 compatible engine...
  • Page 30 PGN Data Required Typical Sender 129026: COG and SOG 129029: GNSS position data Course made good 129284: Nav data Garmin chartplotter and GPS antenna 129285: Navigation (route and waypoint) 129283: Cross track error 129026: COG/SOG 129029: GNSS position Distance made good...
  • Page 31 NMEA 2000 Trip Data Data Type PGN Data Required Typical Sender 129026: COG and SOG Odometer GPS antenna 129029: GNSS position data 129026: COG and SOG Trip odometer GPS antenna 129029: GNSS position data 129026: COG and SOG Average GPS speed GPS antenna 129029: GNSS position data 129026: COG and SOG...
  • Page 32 NMEA 2000 Weather Data Data Type PGN Data Required Typical Sender 130310 and 130311: Environmental parame­ ters (old) Barometer Barometric pressure sensor 130314: Actual pressure 130310 and 130311: Environmental parame­ ters (old) 130312: Temperature (old) Air temperature Air temperature sensor 130316: Temperature, extended range 130311: Environmental parameters Humidity...
  • Page 33 Data Type PGN Data Required Typical Sender 130306: Wind data 127250: Vessel heading Cardinal wind direction A wind sensor, a water speed sensor, 128259: Water speed (less-accurate and a heading sensor 130306: Wind data 127250: Vessel heading 128259: Water speed A wind sensor, a water speed sensor, Beaufort scale 129026: COG/SOG...
  • Page 34 Wind VMG (less-accurate 129029: GNSS position Wind sensor and a GPS antenna 130306: Wind data Waypoint VMG 129284: Nav data Garmin chartplotter and a GPS antenna Maximum apparent wind speed 130306: Wind data Wind sensor 128259: Water speed Maximum true wind speed...
  • Page 35 NMEA 2000 System Data Data Type PGN Data Required Typical Sender 129026: COG/SOG Time of day GPS antenna 129029: GNSS position data 129026 - COG/SOG Date GPS antenna 129029 - GNSS position data © 2008 Garmin Ltd. or its subsidiaries...
  • Page 36 © 2008 Garmin Ltd. or its subsidiaries support.garmin.com...

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